Given that the capacitance of capacitor is C = 5.5*10^-6 F
Potential difference is ΔV = 35V
Inductance is L = 12 mH
                        =
12*10^-3 H
(a) Energy stored in the system is
              Â
U = (1/2)C*ΔV^2
U=0.5*5.5*10^-6*35^2
U = 3.37 mJ
(b) Frequency of oscillation is f = 1 / 2Ï€ square root (LC)
f=1/(2*3.14 square root (12*10^-3*5.5*10^-6))
                                               =
619.96 Hz
(c)    The maximum current is Imax = CΔV/ square
root (LC )
=5.5*10^-6*35/ square root (12*10^-3*5.5*10^-6)
                                                     =
0.75 A
I hope help you.
